The selvas or equatorial forests are important for hardwood trees such as mahogany, rosewood, and rubber. The camaiiba palm tree yields wax, which is used for making shoe polish, furniture polish, lipstick, and candles. The bark of the cinchona tree yeild quinine, a medicine used for treating malaria. Balsa, which is a lightweight wood, Brazil nus, gum, resins, and dyes are other products obtained from selvas.